I had the same problem and always had to drive the Pantera without shoes on. As mentioned herein, a pedal assy. spacer makes a huge difference. I bought mine from SACC but Kirk Evans has them too. I also bent my brake pedal 3/8" to the left. I've seen owners cut the brake pedal pad off, then fab a new one the exact same size but weld it back on, offset 3/8" to the left. Jack Richards wrote an article about this mod in a POCA newsletter, decades ago. These two mods should solve your problem. The final thing I did, because I could, was to remove the throttle cable and its mount from the right side of the pedal. I was then able to center my right foot on the throttle pedal. My EFI system had the option of DBW, so I decided to give it a try. I used a Lokar DBW pedal and welded my aftermarket aluminum gas pedal to it at a more comfortable angle.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.